1. He backed the car into the garage. 他把汽车倒开到汽车房里去。
2. The child backed away from the big dog. 那个孩子看见大狗就向后退了。
3. Peter claimed that Tom had taken his new book but backed down when the teacher talked with him. 彼得说汤姆拿走了他的新书，但老师和他谈话时，他又不敢坚持他的说法了。
英英解释
adj.
1. having a back or backing, usually of a specified type
2. having backing
3. used of film that is coated on the side opposite the emulsion with a substance to absorb light
